What is sameAs property?

The sameAs property is a schema.org attribute that links an entity (most often an Organization or Person) to authoritative external profiles that describe the same entity — Wikidata, Wikipedia, LinkedIn, Crunchbase, official social accounts, and category registries. In AI search it is the most direct signal a brand controls for entity reconciliation: it tells the engine 'this brand is the same entity as these trusted profiles,' and each link lets the entity inherit some of the target profile's resolution confidence. The mechanism is triangulation — the more authoritative profiles agree that one set of facts describes a single entity, the higher the engine's confidence when it resolves and cites the brand. Accuracy matters more than quantity: a sameAs link pointing at a profile with a contradictory name or a stale category actively lowers confidence, so the sameAs graph should be curated and reconciled, not padded. The highest-value nodes in 2026 are Wikidata and Wikipedia, which the major engines lean on heavily for entity attributes and disambiguation.